Check-valve.



P. J. BARD'O. CHECK VALVE APPLIOATION FILED APR. 20,1912.

Patented Sept. 17, 1912.

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FRED J. BARDO, 0F BUFFALO, NEW YORK.

CHECK-VALVE.

Specification of Letters Patent.

Application filed April 20, 1912. Serial No. 692,106.

To all whom it may concern:

Be it known that I, FRED J. BARDO, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented new and useful Improvements in Check-Valves, of which thefollowing is a specification. I

.This invention relates to a check valve and has the object to produce avalve of this character which is simple and inexpensive in constructionand not liable to get out of order and which can be easily installed andalso readily repaired when necessary.

In the accompanying drawings: Figure l is a longitudinal section of myimproved check valve interposed between the two sections of the pipe,tube or conduit. Figs. 2, 3 and 4 are transverse sections in the com c;

Similar characters of reference indicate corresponding parts throughoutthe several views.

The casing of my improved check valve may be variously constructed butas shown in the drawings the same preferably comprises a longitudinalcontracted central part or body 1 which is preferably of cylindricalform in cross section, and two enlarged cupshaped ends or sockets 2, 3arranged at the front and rear ends of the central part forming aninternal shoulder 4 between the front socket and the body which facesforwardly and an internal rearwardly facing shoulder 5 between the rearsocket and the rear end of the body. Within the bore of the body thesame is provided with a plurality of longitudinal guide ribs 6, four ofsuch ribs being employed by preference, as shown n Fig. 4. Each of thesockets of the body is preferably provided with an internal screw thread7, as shown in Fig. 1.

Within the rear socket of the valve casing is arranged a valve disk 8which is preferably held in place by providing the same with an externalscrew thread 9 on its periphery which engages with the internal threadof the rear socket. This valve disk is preferably screwed into the rear'socket until its front side bears against the rearwardly facing shoulderof the valve casing. At its center the valve disk is provided with anaxial part 10 the front end of which is beveled so as to form the valveseat 11 proper.

Within the front socket of the valve casing is arranged a stop disk 12which is also secured therein by providing the periphery thereof with anexternal screw thread 13 which engages with the internal thread of afront socket and is screwed inwardly in this socket until its rear sidebears against the forwardly facing front shoulder of the valve casing.At its center this stop disk is provided with an axial relief opening 19the rear end of which is flared rearwardly, as

Patented Sept. 17, 1912.

shown at 14, and around this central opening the stop disk is providedwith a plurality of side openings or passageways 15 which are arrangedin an annular row, each of said side openings being in line orregistering with the space between two adjacent guide ribs of thecasing.

16 represents a valve stopper preferably of ball-shape, as shown, andarranged within the body and adapted to engage at its surface with theinner edges of the guide ribs and also with the beveled or flaring seatsof the valve disk and the stop disk.

17 18 represent the two sections of a pipe, tube or conduit of which thecheck valve forms a part, the opposing ends of these sections beingpreferably connected with the front and rear sockets by providing thesame with external screw threads which engage with the internal threadsof the sockets respectively. These pipe sections are preferably screwedinto the socket until their inner ends bear against the outer sides ofthe front and rear disks and thereby aid in holding the latter in placewithin the casing.

lVhile the liquid, gas or other medium is passing forwardly through theconduit and the valve casing the ball stopper is moved forwardly awayfrom the valve disk until it engages with the stop disk, as indicated bydotted lines in Fig. 1. In this position of the ball stopper the fluidpasses from the rear pipe sectlon through the port of the valve disk,thence lengthwise through the body of the casing and through theplurality of side openings in the stop disk and to the front pipesection. While the medium isthus passing through the valve casing itsflow is distributed uniformly throughthe several side openings of thestop disk without any materialdeviation in the course of the medium,thereby reducing the resistance to the flow of the same to a minimum. Byengaging the stopper with the stop disk at the rear end of the reliefopening the stopper is permitted to remain firmly in engagement with thestop disk and thereby prevent chat- 3 full lines in Fig. 1, therebypromptly checking the back flow of the pressure medium and preventingthe further back flow of the same.

My improved check valve is particularly desirable for use where checkingof the backward flow of the pressure medium needs to be arrestedpromptly and also for purposes in which the liquid which is beingconducted should flow forwardly as directas possible so as to reducethe'agitation of the medium. My improved construction of check valvepermits of accomplishin this purpose at comparatively low cost withoutthe employment of any delicate parts which are liable to get out oforder, thereby causing this Valve to perform its operation withoutrequiring frequent adjustment or repairs.

I claim as my invention:

1 A check valve comprising a casing ,having a body provided withinternal longitudinal guide ribs and sockets at its front and rear ends,a' valve disk arranged in the rear socket and provided with a centralport, a stop disk arranged in the front socket and provided withanannular row of openings around the center thereof, and a stoppermovable len hwise on the inner edges of' said ribs an capable ofengaging with the valve disk for closing the port thereof and preventingbackward movement through the valve. of the medium which is beingconducted or of engaging the stop disk and permitting the flow of saidmedium through the valve.

2. A check valve comprisin a casing having a reduced body provide withinternal longitudinal guide ribs and enlarged internally threadedsockets at the front and rear ends of the body forming forwardly andrearwardly facing shoulders at the front and rear ends of the body, arear valve disk arranged in the rear stopper and engaging with said rearshoulder and having an ex-.

ternal thread engaging with the internal thread of the respective socketand also provided centrally with a port, a front stopdisk arranged inthe front socket and engaging with said front shoulder and having anexternal screw thread engaging with the internal thread of therespective socketand also provided with a central opening and with anannular row of openings around said central opening, each opening of theannular row being in line with the space be tween two adjacent ribs ofthe body, and a ball stopper movable lengthwise in the body on the inneredges of said ribs and adapted to engage: the front side of the valvedisk for closing the port thereof or the rear side 7 of the stop diskover the rear end of the central opening thereof. Y

Witness my hand this 18th day of April, 1912.

FRED J. BARDO.

Witnesses THEO. L. PoPP, ANNA HEIGIS.

